Printing mechanism for adding-machines.



I N. WHITE. PRINTING MECHANISM FOR ADDING MACHINES.

APPLICATION FILEDDCT. 17- I914.

. Patented June 12, 917.

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I, 25, r IHIIIIHIIIJ l' uununu I 4 r I //l N. WHITE PRINTING MECHANISM FOR ADDING MACHINES. APPLICATION FILED OCT. 1?. 1914.

Patented June 12, 1917.

5 SHEETSSHEET 2.

N. WHITE.

PRINTING MECHANISM FOR ADDING MACHINES.

APPLICATION FILED OCT. I7, 1914.

mzw mu Patented June 12, 1917.

5 SHEETS-SHEET 3- I II p r N. WHITE.- PRINTING MECHANISM FOR ADDING MACHINES. APPLICATION FILED OCT-I7. I9I4.

:I 844E w Patented June 12, 1917 5 SHEETS-SHEET 4.

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tory to the same being added and listed. The keys 29 are normally held upraised b,y

springs 241-8 and have lateral pins 89 adapted to engage cams 88 formed on looking bars 88. which slide transverse to the keys, one bar 88 being provided for each row of the keys 2 9, as will be readily understood.

The locking bars 88 cooperate at their front at their lower ends by means of studs 81,-

with levers :75 which are pivoted between their ends, see Fig. 3, to the shaft 39 which is the handle or actuator shaft of the ma- The levers 75 are normally acted on by springs 76attached to arms 75 of the levers, the tendency of the springs being to pull downwardon the front ends of the levers and thereby to force the adding racks downward and at the same time force upward the type carriers 95 which are jointed by studs 941 with the rear ends of said levers 75. In other words, theadding racks. 80 are mounted for vertical sliding movement at the front 'of the machine while the type carriers 95 are similarly mounted at the rear of the machine. A. large spring 52 is connected with 'an arm onthe shaft 39 which carries the handle 38 and normally tends to hold said handle'at its rearmost limit of movement as seen in Fig. 2. Furthermore the shaft 39 carries the crooked arms 69 which are connected together at their rear ends by-a rod 73 and a detent bar 74, the latter adapted to engage the rear ends of the levers 75 to hold the latter normally in the position shown in Fig. 3. The arms 69 have cam slots 69 therein and a counter or auxiliary shaft 72 arranged above the rear ends of the levers 7 5 has downwardly extending arms-71 provided with rollers operatmg in the cam slots 69, the cooperation of the parts being such that on pulling forward the handle 38 and consequently rocking the shaft 39 the arms 69 are raised,

causing the rollers 70 to traverse the slots 69- and thereby im artinga rocking move-' ment to the shaft 2. The shaft 72 is designed to operate certain parts of the printing mechanism for which purpose said shaft carries a vertically projecting arm 161, see

.Figs. 5 and 12, the arm 161 having its upper end provided-with a full stroke compelling rack in the form of an extension of said arm, and having a stud 165 which engages in the lower bifurcated portion-of a lever 166 which projects downwardly froma shaft 186 which will-be hereinafter more fully described in respect to function and operation.

As shown 1n Flg. a a cam 40 is mounted von the shaft 39 and a flexible connection 77, 78 is provided between said cam and an arm 79 mounted on the shaft 72 whereby motion may be transmitted from the shaft 39 to the shaft 72, said motion being also transmitted to the shaft 186, previously mentioned; The lever 79 cooperates with certain totaling mechanism, not shown, for the reason that the adding and totaling features of the machine in connection with which my invention is employed do not form a part of the present invention.

Referring again especially to Fig. 2 it is to be noted that the amount keys 29 are adapted to be depressed to cause slots formed at the lower ends of said keys to operate virtually as cams on pins 92, one of which is carried by each of a series of index steps 90 provided for each row of keys. Thus on depressing a key 29 a cooperating index stop 90 is forced outward at its front end into the path of movement of the lug type may be employed in connection with the printing mechanism hereinafter described. It sufiices to say, however, that the type carriers 95 are controlled in their movements by the adding racks 80 connected to the lever 75, thelatter parts being limited, "of course, in their movement by the positioning of the index stops.

The type carriers of the printing mechanism have heretofore been referred to as consisting of vertically movable type bars 95 arranged in the rear portion of the keyboard section of the machine, said bars being supplied at their upperv ends with the spring retracted type members 95, each type member carrying a type face at one end and having its other end arranged to be impinged by suitable impression means inthe form of a type hammer. 'The type faces of the type'members 95 are numbered from 1 to 9 consecutively and the uppermost type member has a cipher indication, as shown in Fig. 7. The printing mechanism is best shown. inFigs. 2 and 5 to 11, inclusive, and each type bar is provided at its upper portion with an incasing plate 167 interlocked are housed between the incasing plate 167 and the body of the type bar 95, as shown most clearly in 9 of the drawings.

A set of type bars 95 of a number corresponding with the number of rows of amount keys 29 of the keyboard is provided and with said type bars is associated a set of hammers 171 for striking the type members a set of hammer drivers 172, each connected with the adjacent hammer, a set of catches 173 of hook-like form for normally restraining the hammers under tension,

and a set of springs 1% connected with the hammer drivers. The above mentioned parts are primarily supported in a frame consisting of; sides 175 and 167, the lower portions of which are connected by tie rods 1 l7! and 178. Said frame for the printing devices is roclrably mounted on a shaft 179 and the left side 175 of the frame has an upwardly extending arm 180 above the shaft 17 9. rod 1.77 constitutes an axis for the va i us catches 173 which are adapted to engage over lugs 181 on the coacting hammer drivers 1.72. The rod 178 has connected thereto a set of springs 182 which are attached also to the catches 1Y3 and normally tend to :lorce the into engagement with 81. Each hammer 171 has a head 1 at its upper e .d to impinge with the adj a cent end of any type member 95 of the co- 1 carrier or bar 95 and at its hammer is loosely pivoted u on the shaft 1' u. llach hammer driver 1, 2 is also *oted on the shaft 179, the '1 driver being connected with the co operat'ug hammer is loosely engaged, and the i1 ediate portion of said part ted abut with the stop bar 1st erefore some lost motion betwcen the ears liil of the driver 172 and the hammer 171 engaged thereby, to provide for the rebound 'of tlie'hammers after impact with the type members 95, the liability of blurring being thus obviated. The arm 180 of the hammer-supporting frame is connected by a driving link184 with an arm 185 of a .of the dash pot'beingattached at its upper and to a cross bar 189 mounted on rocker rock shaft 186,.to' which shaft 186 the lever 166 before referred to is connected. .A'dasll pot 187 or equivalent retarding device is arranged at the'left of the printing mechanism," being supported upon a cross rod 188 of the frame of the machine, the plunger rod arms 1'90 attached to the shaft 186. A suitable platen 216 is arrangedto coiiperate with the printing members 95 of the type carriers 95 and the tails or lower ends of the catches 173 are split to provide laterally extending in front of the tail portion of the next ad acent catch to the left, whereby the cipher type members 95' of 'vated type carriers.

type carriers 95 not operated by adjustment of the keys 29, will be printed on operation of the impression means.

With the above description in view, and bearing in mind that each type carrier 95 hasmn abutment 95 at its front edge to be engaged by the tails of the catches 173 when the latter are rocked with the hammer frame rearwardly, and when the type carriers are not in their Zero positions, the operation of the mechanism will be clearly understood from the following:

During the initial movement of the handle 38, those type carriers 95 which are indexed to the printing point, after which the frame 175176 will be rocked slightly rearwards until the tails of predetermined catches 173 engage with the abutments 95 of the ele- Such engagement will tilt the catches 173 from the studs 181, thereby rcleasing the hammer drivers 172 of such catches and permitting the hammers 1'71 of said drivers to be fired, or operated against the previously adjusted printing members 95. The provision of the dash pot retardcr 187 governs the speed of the machine, preventing scattering of the type and violent manipulation of the handle 38. lVhen the frame 175176 of the printing devices is rocked back to its normal position, the catches 173 will be reingaged with. the studs 181 of the hammer dr' ers 172 and locked until another transaction of the machine is performed.

As shown in Figs. 5, 6, 8 and 9, a duplicate printing mechanism is provided and consists of auxiliary type carriers 95*, each of which is connected with the corresponding one of the main type carriers 95. To establish such connection, a plurality of gear shafts 193 are provided in superposed relation upon a suitable frame 194. There are two gears 195 on each shaft 193, said gears meshing with gear teeth 196 on the rear edges of the corresponding type bars 95 and 95*. That is to say, the gears 195 of the lowermost shaft engage with the units type carriers 95 and 95 of the'main and auxiliary printing mechanisms. The gears of the next shaft 193 engage with the teeth on the rear edges of corresponding tens type bars of the with the type carriers 95 so the operations of the main and auxiliary printing mechanisms are simultaneous and capable of making a mitt.

list or record in duplicate, which is often desirable for the printing of a check or slip placed in the machine and for printing a recording strip, which is constantly passing through the machine. i

As usual in these machines a suitable inking ribbon 192 is fed between the printing members and the work, and preferably, as

shown in Fig. 1, said ribbon passes around the spools 198 and 199. Said spools have toothed wheels, the teeth of which, are engaged by feeding and reversing pawls 202" and 203, carried respectively by levers 202 and 203. The levers 202'and 203 are connected by a plate 20 1 which is adapted to be reciprocatod through connections, not shown, intermediate the plate and the main actuator. As the details of the ribbon feeding mechanism do not constitute a part of the present invention, theyare not herein de scribed.

Platen feed mcchamiam.-The mechanism for feeding the roller platen 216 is shown clearly in Fig. 9 and certain parts are illustrated in Fig. 7 also. The platen 216 is arranged above the paper spool 217 which carries the roll of paper 218 that constitutes the recording strip incidentally referred to hereinhefore. Mounted upon the axis 219 of the spool is an angle lever 220, the lower arm of which is formed with a cam 221 arranged to be engaged by the arm 180 which Y rocks with the hammer frame.

The other arm of the lever 220 is approximately vertical and carries at its upper end a roller 222 which operates in a cam. slot 223 of a feed lever 22dpivoted to the axis of the platen 216. Pivoted to the lower outer portionof the feed lever 224: is a spring actuated feeding pawl 225 adapted to engage at one end with a toothed disk attached to an end of the platen, the other end or tail of the pawl :be-

ing engageable by a lateral pin 226 on the vertical arm of the angle lever 220. A pivoted pressure finger 227 is mounted above the lever 220 and a spring 228 hold's said lever in engagement with a star-wheel 229 on the right hand end. of the platen 216, the part 227 preventing over-rotation of the platen. A feeding roll 230 cooperates with the platen and the recording strip 218 in the well-known manner and .a lever 231'is arranged to be manipulated to release the feed roll from operative. engagement with the strip 218 for adjustment of the latter or other purposes.

With the arrangement of parts in view as above set forth, it will be apparent that on the forward movement of the arm 180, the cam 222 moves downwardly, permitting the lever 220 to be tilted by the spring 232 connected therewith. Such movement of the lever 20 imparts upward movement to the feed lever 22d and the pawl 225 carried thereby, this action raising the pawl preof the feeding pawl 225 with the pin 226,

thereby tilting the pawl from engagement with the disk 216 and permitting the platen to be turned in either direction at the will of the operator.

After the keys 29 are depressed to set up a suitable amount to be added and listed by the machine, the handle 38 is pulled forward and during such initial movement, the

indexed adding racks move downwardly and the corresponding type carriers move upwardly until said parts reach their differentially adjusted positions. Just prior to 99 the final movement of the handle 38 completing its forward stroke, the hammer drivers are fired to complete. the operation of the printing and listing mechanism. The ribbon feeding parts are also actuated at the 5 proper time to feed the inking ribbon 197 to present a fresh portion thereof to the printing point of the type members and the platen feeding devices are cprrespondingly operated to perform their proper functions. 100

Since the printing or listing mechanisms are provided in duplicate, one of said machanisms will recordtransactions of the machine on a recording strip while the other is capable of listing said transactions upon a slip, check, or other member placed in the guide 233. Springs 248,-shown'in Fig. 3, are connected with the keys 29 and normally tend to restore said keys when released.

Having thus described the invention, what 119 is claimed is:

' 1. In printing mechanism for adding machines, the combination of type carriers, means controlling differential positioning of I said type carriers, a hammer section com- 15 prising hammers cotiperative with the type carriers, drivers for said hammers, means tending 'toactuate the drivers to cause firing of the hammers, restraining means for the hammer d1'ivers,a frame carrying said re- 12o straining means, a platen, a feeding device for said platen, operating means'including a lever to actuate said feeding device,-a connection between the-frame and lever, and means to actuate the lever and thereby operate the frame to effect release of the hammer drivers from the 1'estraining .means and platen feed movement.

2. In a machine of the class described, the combination of type carriers, means for 139 naaaeea adjusting said type carriers to printing positions, a rocking frame, hammers and hammer drivers mounted on said frame, catches normally restraining said drivers and also carried by the frame, and means for rocking said frame to impart bodily movement to the catches to release the hammer drivers therefrom.

3. In printing mechanism for adding ma 4:. In printing mechanism for adding ma chines the combination of type carriers, means controlling dlfierential positioning of said carriers, a hammer section comprising a pivoted frame, hammers mounted upon the' axis of said frame for cooperation with the type carriers, hammer drivers co-axially mounted with respect to said hammers and interlocked with the latter, means to operate the hammer drivers for impression purposes, restraining devices for said hammer drivers also mounted on said frame, means whereby the hammer drivers may be released from said restraining devices to efi'ect printing action, a platen, feeding means for said platen including a lever, connecting means between said frame and the previously mentioned operating means for ,causing the movement of the frame and restraining de 7 vices thereon, and means intermediate the said frame and said lever feeding device whereby the movement of the former is im-' parted to the latter. I

5. In a machine of the class described,

printing mechanism comprising a set of yen tically sliding type earners, means for erating'said carriers to di'fierentially peer tion the same for printing action, a second set of type carriers each of which corre sponds with one of the carriers of the first mentioned set, gearing operatively connecting the various corresponding carriers of the two sets aforesaid, said gearing comprising a; series of superposed transnnssion shafts and overlapping gears on said shafts, the carriers being provided with rack portions to engage the gears, and means supporting the type carriers for sliding movement and for holding their rack portions in cooperation with the gears aforesaid including horizontally disposed guide rods, the carriers being formed with alined slots receiving said guide rods and in which the gnide rods 0 eri ate incident to the movement of the carriers;

6. In printing mechanism for adding machines, the combination of type carriers, means controlling differential positioning of said type carriers, a hammer section comprising hammers cooperative with the type carriers, drivers for said hammers, means tending toactuate the drivers to cause firing of the hammers, restraining means for the hammer drivers, a frame carrying said restraining means, a platen, a feeding device for said platen, operating means including a lever to actuate said feeding device, a connection between the frame and lever, means to actuate the lever and thereby operate the frame to effect release of the hammer drivers from the restraining meansand platen feed movement, and retarding means including a dash pot. operatively connected with the operating means for the printing mechanism whereby to control the speed of operation of the latter. I

In testimony whereof I afix my signature in presence of two witnesses. 1 NELSON WHITE.

Witnesses:

FRANK MENEFEE, Bonner J. lUP'roN. 

